Fig. 3

In vitro antibacterial activity of the TPU, TPU/DA, TPU/NS1, TPU/NS2.5 and TPU/NS5 membranes. OD₆₀₀ values of a P. aeruginosa, b E. coli, c S. aureus and d MRSA bacterial suspensions after 24 h co-incubation with samples. e Photographs of bacterial colonies of P. aeruginosa, E. coli, S. aureus and MRSA. The number of bacterial colonies formed by f P. aeruginosa, g E. coli, h S. aureus and i MRSA. The values are shown as the mean ± SD (n = 3)